Re: kern/51654: wrong ps_strings breaks emacs20

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Sat, Nov 26, 2016 at 04:00:00AM +0000, dholland%NetBSD.org@localhost wrote:
> After updating emacs dumps core. After spending a long time barking up
> the wrong PaX tree, it seems that the problem is that an invalid
> pointer is being provided in __ps_strings and this causes _libc_init
> to segv.

The address space layout changed. ps_strings is placed at the very top,
without PAX it is at a fixed address.

> I haven't the slightest idea why this happens only with emacs but I
> imagine it's a consequence of the emacs dump/undump mechanism somehow.

Combine this with the changed MAXUSER address and now certain cached
locations no longer match.

Joerg